Hear from the gold and silver medallists from the mixed 4x400m relay. The American team of Wilbert London, Allyson Felix, Courtney Okolo and Michael Cherry set a new world record time of 3:09.34 and in doing so, Felix became the most decorated athlete of all time at the IAAF World Athletics Championships, with her twelfth medal. #4x400m #Mixed4x400m #USA #AllysonFelix Watch more mixed zone interviews from Doha in our Mixed Zone playlist - youtube.com/playlist?list=PLz-gfY4so9kY2Bba9pOIfJj6x0daE2Bb8 Subscribe to our channel - youtube.com/user/IAAF2012?sub_confirmation=1 ⭐️ Follow us on Twitter - twitter.com/iaaforg ⭐️ ⭐️ Follow us on Facebook - facebook.com/WorldAthleticsClub ⭐️ ⭐️ Follow us on Instagram - instagram.com/iaaf_athletics ⭐️ Make sure you subscribe for athletics highlights, interviews with the athletes, training tips and more!